Door frame especially for use in fire door assembles

ABSTRACT

The present door frame is for being mounted in an opening in a wall and includes fixing elements attachable to the walls and a frame portion adapted to fit a door or the like and connected to said fixing elements.

United States Patent c/o Hellbergs lndustrier AB Box 73, 46400 InventorBo lnguli Mellerud, Sweden Appl. No. 3,380 Filed Jan. 16, 1970 PatentedAug. 3, 1971 Priority Jan. 23, 1969 Sweden DOOR FRAME ESPECIALLY FOR USEIN FIRE DOOR ASSEMBLES 1 Claim, 8 Drawing Figs.

US. Cl

Int. Cl

[50] Field of Search 49/504, 505; 52/213-217 Primary Examiner-KennethDowney Attorney-Linton & Linton ABSTRACT: The present door frame is forbeing mounted in an opening in a wall and includes fixing elementsattachable to the walls and a frame portion adapted to fit a door or thelike and connected to said fixing elements.

PATENTEU AUG 3197;

SHEET 1 [IF 3 FIG. 5

INVENTOR BO l/VGULF ATTORNEYS PATENTEUMG 31mm SHEET 2 BF 3 II I I/111141 INV BO lNGULF- NTOR ATTORNEYS PATENTEU ME 31971 SHEET 3 OF 3 Fl]I'lllllllllll ill .Illlllllnllll ATTORNEYS DOOR FRAME ESPECIALLY FOR USEIN FIRE DOOR ASSEMBLIES The present invention is concerned with a doorframe especially to be used in fire door assemblies, and preferably tobe manufactured to steel sections, which frame is designed to be placedwithin the opening of a wall and comprises a portion, which is providedwith a stop edge, which is adapted to fit the intended shutting element,a door or the like, whereby said portion constitutes a separatearrangement. The frame furthermore comprises a number of fixingelements, which are arranged to be fixed preferably along two edges ofthe opening of the wall provided for the frame, and fitting into saidopening, with said portion and the fixing elements being arranged to beconnected with each other in such divergent positions inbetween themthat said fitting to the shutting element and opening of the wallrespectively is maintained after jointing the assembly.

Said door frame is especially well fitted to be used in fire doorassemblies, but it can also be used for other types of door or forscuttles and windows. The frame is designed to be manufactured of steelsections.

In the construction of buildings substantially two methods are employedfor the mounting of frames for doors, scuttles and windows in the wallsof the building. Either a readymade frame is mounted within an openingprovided in the erected wall, or the case may also be that the wall isbuilt, preferably by concrete casting, around a frame, which is mountedbeforehand in the casting mould. The first mentioned method involves thedrawback that on account of difficulties to obtain a precise fit, theopening for the frame has to be constructed with considerable oversizedimension, which requires a lot of work to fit the door frame, and inthe case of concrete walls for example may make additional concretecasting work necessary. When the last-mentioned method is used, as ispreferably the case in cast concrete walls, whereby the frame entersinto the casting mould assembly, other inconveniences presentthemselves, viz the frames have to be available at a very early stage ofconstruction, the frame has to be separated from the element, whichbelongs to it, e.g. the door, which involves risks of mistakes and theremay also arise difficulties in the fitting work and further the framemay easily be damaged, when the wall is constructed.

It is an object of the present invention to eliminate said drawbacks andprovide a frame, which can be placed within the opening of a wallallowing a great permissible variation in the tolerances of thedimensions of the opening without therefore having any special fittingwork in the opening itself.

Said object is obtained by designing the frame so that the fixingelement is a plane perpendicular to the opening of the wall in theintended position for mounting has a cross section, which is widening,preferably stepwise, in a direction towards one of the wall sides, andthat said portion of the frame designed to cooperate with the shuttingelement at least at its outwards-facing sides, which are designed tocooperate with the fixing elements has a corresponding stepped crosssection so that when the fixing elements are mounted in the opening ofthe wall, said portion of the frame can be pushed to the desiredmounting position relative to the fixing elements from one side theopening.

Two embodiments of the invention will now be described with reference tothe accompanying drawings, in which:

FIGS. l-S illustrate an embodiment for concrete or brick walls, in whichFIG. I is a horizontal cross section through the side members of theframe,

FIGS. 2 and 3 are cross-sectional views of corner coverings for theframe,

FIG. 4 is a view of a comer, and

FIG. 5 is a vertical cross section of a threshold.

FIGS. 6 to 8 illustrate a second embodiment designed preferably forsteel walls and walls of plaster slabs, in which FIG. 6 is a horizontalcross section through the side member of the frame,

- upper part, and

FIG. 8 is a side elevational view of the frame.

Both the embodiments illustrated refer to door frames.

The basic idea of the invention is the portion of the frame, which isarranged to support a door panel or the like, for example, hinges to befitted to the frame in a conventional manner and be provided .with astop edge against said frame and be able to be locked, not being placeddirectly within the opening of the wall, but being fastened to a numberof long fixing elements, which have been mounted in the opening of thewall before the final insertion of the first said portion of the frame.Said fixing elements, which closely follow the wall ir respective of itstolerances, can be mounted to said portion of the frame in differentpositions, so that thereby an adaptation can be made between the openingof the wall and said portion of the frame.

Said basic idea is clearly evident from FIG. I, in which the numeral Iindicates a cast opening in. a wall. In said opening by means of steelnails 2 or similar, a fixing element 3 has been fastened. The frameportion indicated by the numeral 4 has a hinge 5 and'a stop edge 6 andis in its turn fastened to the fixing element 3 by means of rivets 7,which can be riveted from the outside of the frame. A suitable type ofrivet being the socalled explosion rivet. The cavity ofthe interior ofthe frame is suit ably filled wit some insulating material 8, such asrock wool by way of example.

Also the details of the design are evident from FIG. 1. In a horizontalcrosscut, the fixing element 3 thus presents a stepped shape with afirst portion 3c extending in the direction towards the opening of thewall, and adjacent thereto a portion 4a located at a right angle to theplane of the wall, and further, a portion 3b pointing in a directionoutwards and away from the wall. To the lasbmentioned portion 3b, theside 4b of the frame 4, which side also is pointing in a direction outwards and away from the wall, is fixed. Thus, one can say that he frameportion 4 with respect to its outside contour is shaped corresponding tothe stepped design of the fixing element.

In FIG. 5 the threshold 9 of the frame is illustrated, which thresholdis resting on the floor 13 with projections 28 and is fixed to a lowerfixing element 10 by means of driving pins or self-threading screws 11and 12. The fixing element 10 is fixed to the floor 13 by means of steelnails 14. The frames 6 and 9, respectively, must be dimensionedaccording to the measurements of the door and in order to make itpossible to fix said frame to the fixing elements in spite of the factthat said elements 3 and possibly also 10 may occupy different positionsdue to the great tolerances of the dimensions of the opening of thewall, the holes for the rivets 7 and possibly also the screws 11 and 12are suitably bored simultaneously in the same operation. However, it isalso possible to provide the fixing elements, said portion of the frame,or both with series of holes, grooves or similar, which permitdisplacements in between them in the mounting work.

The corners of the portion 4 of the frame and/or the fixing elements canbe jointed by special cover plates and mouldings 29 and 30 as per FIGS.2 and 3, by means of which the corner joint is covered as seen in FIG.4.

As is evident from FIG. 6, the frame according to the second embodimentis designed to be mounted on walls, which are built up of slabs 31 and32 fastened to crossbars 20. A fixing element 22 by means of rivets 21is fastened to the crossbar 20, in this particular case a steel section,and carries the side members 23 of the frame. These members are fastenedto the fixing elements 22 by means of rivets 24. Furthermore to one sideof the frame a so-called shadow moulding 25 is fastened, which shallcover the junction between the slab 32 and he fixing element 22.

The connecting upper part 26, see FIG. 7, of the frame at the top issupported by the side members 23 of the frame and is not fixed to thewall by any special fixing element. Also here there is a shadow moulding27. The shadow mouldings 25 and 27 may be mitered and welded together.

When mounting the frame, one proceeds as follows: In the readymadeopening of the wall-fixing elements 3 and 22, respectively, are fastenedon both sides in the manner mentioned by means of, for example, steelnails 2 and rivets 21, respectively. Said fixing elements are shaped tothe effect that the portion 4 and 23, 26, respectively, of the framefrom one side of the opening can be pushed into contact with the fixingelements, whereafter the desired holes are drilled and the rivets 7 and24, respectively, are fastened, whereafter the fixing element and saidportion of ,the frame are .connected together. Furthermore, foraesthetic reasons it may be required to mount a shadow moulding orsimilar 29,30 and 25, 27, respectively. Both embodiments substantiallycorrespond with each other.

When mounting the portion 4, and 23, 26, respectively, of the frame itcan be ready made and include side members, connecting header at thetop, bottom portion, and threshold, jointed together by means of weldingto form one integral unit. However, it can also be delivered in separateparts and be joined together in connection with the placing within theopening, by way of example using corner jointing elements.

With a frame according to the invention, which thus comprises anordinary frame as well as fixing elements belonging thereto, a mountingwith a good fit can be obtained in an opening of a wall, which isalready built up, without the building itself having to be affected byany complicating working operations.

The embodiments described and illustrated in the drawings can be variedas to their design and suitable use without therefore parting from thebasic idea of the invention.

We claim:

I. A frame especially to be used in fire door assemblies and preferablyto be manufactured of steel sections, which frame is designed to beplaced within the opening of a wall and com prises a portion which isprovided with a stop edge adapted to fit the intended shutting element,such as a door or the like, whereby said portion constitutes a separatearrangement, a number of fixing elements, which are arranged to be fixedalong two edges of the opening of the wall provided for the frame, andfitting into said opening, said portion and said fixing elements beingarranged to be connected with each other in such divergent positions inbetween them that said fitting to the shutting element and opening ofthe wall, respectively, is maintained afterjointing the assembly, saidfixing elements in a plane perpendicular to the opening of the wall inthe intended position for mounting has a cross section, which iswidening stepwise in a direction towards one of the wall sides, and thatsaid portion of the framedesigned to cooperate with the shutting elementat least at'its outwards facing sides which are designed to cooperatewith said fixing elements, has a corresponding stepped cross section,whereby when said fixing elements are mounted in the opening of thewall, said portion of the frame can be pushed to the desired mountingposition relative to said fixing elements from one side of the opening,said fixing elements each in the intended mounting position having aportion positioned substantially in the opening of the wall andsubstantially extending perpendicular to the plane of the wall, saidfixing element portion outside of the surface of the wall having aportion projecting in a direction outwards from the opening of the wall,and that at the other surface of the wall a portion of each fixingelement projects in a direction inwards and towards the opening of thewall, said other portion of the frame intended to cooperate with theshutting element being arranged so that it with one of its sides in theintended mounting position is substantially perpendicular to the planeof the .wall and is arranged to be connected to the lastmentionedportion of the fixing elements extending inwardly and towards theopening of the wall, while its opposite side has a portion extending ina direction outwardly from the opening of the door, which latter portionis arranged to be connected with said portion of the fixing elementsextending in a direction projecting outwardly from the opening of thewall, and means for connecting one of said frame sides to saidlastmentioned portion of the fixing elements extending inwardly andtowards the opening of the wall and said frame opposite side to saidfixing elements portion extending in a direction projecting outwardlyfrom the opening of the wall.

1. A frame especially to be used in fire door assemblies and preferablyto be manufactured of steel sections, which frame is designed to beplaced within the opening of a wall and comprises a portion which isprovided with a stop edge adapted to fit the intended shutting element,such as a door or the like, whereby said portion constitutes a separatearrangement, a number of fixing elements, which are arranged to be fixedalong two edges of the opening of the wall provided for the frame, andfitting into said opening, said portion and said fixing elements beingarranged to be connected with each other in such divergent positions inbetween them that said fitting to the shutting element and opening ofthe wall, respectively, is maintained after jointing the assembly, saidfixing elements in a plane perpendicular to the opening of the wall inthe intended position for mounting has a cross section, which iswidening stepwise in a direction towards one of the wall sides, and thatsaid portion of the frame designed to cooperate with the shuttingelement at least at its outwards facing sides which are designed tocooperate with said fixing elements, has a corresponding stepped crosssection, whereby when said fixing elements are mounted in the opening ofthe wall, said portion of the frame cAn be pushed to the desiredmounting position relative to said fixing elements from one side of theopening, said fixing elements each in the intended mounting positionhaving a portion positioned substantially in the opening of the wall andsubstantially extending perpendicular to the plane of the wall, saidfixing element portion outside of the surface of the wall having aportion projecting in a direction outwards from the opening of the wall,and that at the other surface of the wall a portion of each fixingelement projects in a direction inwards and towards the opening of thewall, said other portion of the frame intended to cooperate with theshutting element being arranged so that it with one of its sides in theintended mounting position is substantially perpendicular to the planeof the wall and is arranged to be connected to the last-mentionedportion of the fixing elements extending inwardly and towards theopening of the wall, while its opposite side has a portion extending ina direction outwardly from the opening of the door, which latter portionis arranged to be connected with said portion of the fixing elementsextending in a direction projecting outwardly from the opening of thewall, and means for connecting one of said frame sides to saidlast-mentioned portion of the fixing elements extending inwardly andtowards the opening of the wall and said frame opposite side to saidfixing elements portion extending in a direction projecting outwardlyfrom the opening of the wall.